Steam-boiler.



PATENTED OCT. 18, 1904. H. E. MOFFA-T. STEAM BOILER. urmonmn mam an 22. 1903.

- MODEL.

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provided with my improvement.

. UNITED STATE Patented October 18, 1904.

PATENT OFFICE.

HENRY ESSON MOFFAT, OF WOODSTOCK, CANADA.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 772,729, dated October 18, 1904.

/ Application filed May 22, 1903. Serial No; 158,327- (No model) tario, Canada, have invented certain new and useful Improvements in Steam-Boilers, of which the following is a specification.

My invention relates to improvements in steam-boilers; and the object of the invention is to provide an attachment for the interior of the boiler wherebythe feed-water before it passes into the body of water in the boiler may be purified and brought as close as possible to the same temperature as the body of water in the boiler and insuch a manner that all mineral matter may be held in a suspended state above the water-line ready to be afterward removed when required, and,'further, to remove the scum from the top of the water in the boiler; and it consists, essentially, of

,a diaphragm extending crosswise at the head end of the boiler below the water-line and above the flues and fire-line and suitably riveted to the head and to the wall at eachside,

a perforated grate located above the same, the filtering-bed supported on such grate, a

blow-off extending inwardly from above the diaphragm at the head end, and an inlet-pipe with branches and distributing-saucers, all as hereinafter more particularly explained.

Figure 1 is a longitudinal section of aboiler Fig. 2 is a cross-section on the line w 7 Fig. 1. Fig. 3 is a detail showing the inlet-pipe and branches and spreading-saucers. i

,In the drawings like letters of reference in- .dicate corresponding parts in each figure.

A is the boiler, andB the boiler-tubesthereof.

O is a diaphragm which extends crosswise of the boiler below the water-line and above the fire-line and lines, as indicated. The diaphragm O is suitably riveted at the sides to the boiler and is depressed toward the center, It

will consequently be seen that no amount of scale forming on it can injure the plate in any way. The diaphragm O is provided with a curled lip C, as indicated, which is designed to receive the scum from the top of the water,

as the top of the lip extends to about the waterlevel.

v D is a wall which extends at the bottom from in proximity to the diaphragm O to the top of the boiler, being arc-shaped at the top to fit the interior contour of such boiler and being provided at the center of the top with an arc-shaped opening D to allow a free circulation of steam and the. carbonic-acid gases along the upper partof the shell, such gases being carried away by the steam into the different uses throughout the plant. The wall D also prevents any saturated steam from pass ing out into the steam-space of the boiler.

E is a perforated gratewhich extends from the wall D inwardly to the head end.

F is a blow-off pipe which extends from a point above the diaphragm O, preferably out through the head end of the boiler.

G isa filtering-bed.

H is the feed-water pipe, which extends into the boiler and is provided with branches 71, which have turned-down ends it, which extend over the convexed saucers/a which are supported from the wall of the boiler by the stems 7f. V

The diaphragm O, hereinbefore mentioned, is substantially on a level and is connected to the blow-off, acts as a perfect skimmer, and serves to remove allithe floating impurities throughout the whole surface of'the boiler. The suspended filtering-beds on top of the perforated grate receive the feed-water, which is delivered on them in a perfect spray from the edges of the saucers 71?, such spray taking vthe form of a complete circle.

It will of course be understood that I provide suitable openings closed by covers for cleaning, which it is not necessary to particularly describe.

By a system such as I describe it will be seen that the water will be purified perfectlyand completely in the boiler itself, the water being discharged therein, so that it will at 'once he brought to the temperature of the water in the boiler and will be spread instantaneously over the filtering-beds, the mineral'matter at once adhering to the same and being prevented from passing down into the main body of the water that comes in contact with the fire-line and in this way preventing the formation of scale on shell, flues, heads, or tubes. The loose stuff that does not adhere to the filterbeds passes down through the perforated grates onto the diaphragm. It will also be seen that as the lip C is just about the level of the water-line in the boiler when the blowoff is used the scum on the water is skimmed from the boiler.

In order not to affect the circulation of the water in the boiler,I provide upwardly-extending arc-shaped pipes or passages I, extending from the diaphragm C upwardly through the filtering-bed into proximity with the inner contour of the boiler and from below the water-line. I also provide straight end pipes or passages J from near the head of the boiler, such pipesextending substantially vertically through the filtering-bed.

It will of course be understood that the form or location of the pipes may be varied at will without departing from the spirit of my invention, the object of such pipes being to carry away the steam and cause a free circulation of the water, as aforesaid.

What I claim as my invention is 1. In a steam-boiler, the combination with the boiler and flues, of an imperforate diaphragm located Within the boiler and above the flues and fire-line and below the level of the water and extending across the boiler and suitably secured thereto, a support for filtering means located above such diaphragm and inlet and outlet pipes above said support.

2. In a steam-boiler, the combination with the boiler and flues, of a diaphragm located above the flues and fire-line and below the level of the water and extending across the boiler and suitably secured thereto and having a gradual fall toward the center, and filtering means located above such diaphragm.

3. In a steam-boiler, the combination with the boiler and fines, of a diaphragm located above the flues and fire-line and below the level of the water and extending across the boiler and suitably secured thereto and having a gradual fall toward the center and provided with a central groove, and filtering means located above such diaphragm.

t. In a steam-boiler, the combination with the boiler and flues, of a diaphragm located above the flues and fire-line and below the level of the water and extending across the boiler and suitably secured thereto and having an upturned end lip, and filtering means located above such diaphragm.

5. In a steam-boiler, the combination with the boiler and flues, of a diaphragm located above the flues and fire-line and below the level of the Water and extending across the boiler and suitably secured thereto and having an upturned end lip, a blow-off extending from a point above the diaphragm at the head end of the boiler, and filtering means located above such diaphragm.

6. In a steam-boiler, the combination with the diaphragm, of the wall provided with an opening at the top, and filtering means behind the wall and above the diaphragm.

7. In a steam-boiler, the combination with the diaphragm, of the wall provided with an opening at the top and filtering means located behind the wall and above the diaphragm, a grate extending on a level with the bottom of the wall and above the diaphragm, and a liltering-bed supported on such grate.

8. In a steam-boiler, the combination with a diaphragm, of the wall provided with an opening at the top and filtering means located behind the wall and above the diaphragm, and the blow-ofi' extending through the filtering-bed and head from above the diaphragm.

9. In a steam-boiler, the combination with the filtering-bed, of an inlet-pipe, branch pipes thereon having downturned ends, and saucers suitably held underneath the ends.

10. In a boiler, a feeding device comprising a pipe, branch pipes connected to said pipe and having turned-down ends, saucers located centrally below the discharge-orifiees from the branch pipes, and means for supporting the same.

11. In a steani-boiler, the combination with the boiler and flues and diaphragm and filtering means located above the diaphragm, of relief pipes or passages extending up through the diaphragm, and filtering means.

12. In a steam-boiler, the comlfination with the boiler and fines and diaphragm and filtering means located above the diaphragm, of the vertical relief pipes or passages extending up through the diaphragm, and filtering means at the head end of the boiler.

13. In a steam-boiler, the combination with the boiler and fiues and diaphragm and filtering means located above the diaphragm, of the are -shaped relief-pipes extending up through the diaphragm and filtering means in proximity to the inner contour of the boiler.

1a. In a steam-boiler, the combination with the boiler and flues and diaphragm and filtering means located above the diaphragm, of the vertical relief pipes or passages extending up through the diaphragm and filtering means at the head end of the boiler, and the areshaped relief-pipes extending up through the diaphragm and filtering means in proximity to the inner contour of the boiler and intermediate of the length of the filtering-bed.

15. The combination of a steam-boiler, a feed-water inlet therefor located above and discharging through the steam-space of the boiler, an imperforate diaphragm located above the fire-line or flues, and a liltering means located above the diaphragm through which the feed-water must pass before it enters the water-space of the boiler.

1 16. The combination of a steam-boiler, a feed-water inlet therefor located above and discharging through the steam -space of the boiler, a filtering means within the steamspace of the boiler through which thefeedwater must pass from the feed-water inlet to the water-space, an imperi'orate diaphragm within the steam-boiler below the filtering means, and an upturned flange for thefree edges of the imperforate diaphragm to retain the sediment or precipitates not retained by the filtering means.

17. The combination of a steam-boiler, a feed-water inlet therefor located above and discharging through the steam-space of the boiler, an imperforate diaphragm located above the fire-line or flues, afiltering means located above the diaphragm through which the feed-water must pass before it enters the water-space of the boiler, and a blow-off pipe the inner end of which is locatedabove the top surface of the imperforate diaphragm.

18. The combination of a steam-boiler, a feed-water-inlet therefor located above and discharging through the steam-space of the "boiler, a filtering means within the steamspace of the boiler through which the feedwater must pass from the feed-water inlet to sediment or precipitates not retained by the filtering means, and a blow-ofl pipe the inner end of which is located above the top of the imperforate diaphragm.

19. The combination of. a steam-boiler, an imperforate diaphragm located above the fireline or flues, a filtering means located above the diaphragm through which the feed-water must pass as it enters the-boiler, and circulatihg-pipes extending through the diaphragm and filtering means. i

20. The combination of a steam-boiler, a feed-water inlet therefor, an imperforate diaphragm within the boiler between the feedwater inlet and fire-line or flues, a filtering means interposed between the diaphragm and inlet, and circulating-pipes extending through the diaphragm and filtering means.

21. The combination of a steam-boiler, a

boiler through which must pass the feed-wa-.

ter from the inlet, an imperforate diaphragm .within the steam-boiler between the bottom of the filtering means and the fire-line or flues to retain the sediment or precipitates that are not retained by the filtering means, and circulatingpipes extending through the diaphragm and filtering means.

22. The combination of a steam-boiler, a feed-water inlet for the steam-boiler, a filtering means within the steam-space of the steamboiler through which mustpass the feed-water from the inlet to the water-space of the boiler, an imperforate diaphragm within the steam-boiler between the bottom of the filtering means and the fire-line or lines to retain the sediment or precipitates that are not retained by the filtering means, an outlet for the filtered feed-water around the side of the diaphragm, and circulating-pipes extending through the diaphragm and filtering means.

23. The combination of a steam-boiler, an imperforate diaphragm located above the fireline or fiues, a filtering means located above the diaphragm through which the feed-water must pass as it enters the boiler, circulatingpipes extending through the diaphragm and filtering means, and a steam-escape from the circulating-pipes to the main outlet.

2%. The combination of a steam-boiler, an

imperforate plate therein, circulating-pipes an outlet from the circulating-pipes to the main outlet from the steam-space of the steam-space to the boiler, the main outlet from .the steam-space, and a steam-escape from the circulating-pipes to the main outlet.

HENRY- ESSON Witnesses:

M. MGLAREN, B. BYD.

MOFFATQ 

